Move alias loading to register process.

Signed-off-by: crynobone <crynobone@gmail.com>
Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

Conflicts:
	src/Orchestra/Foundation/FoundationServiceProvider.php
Remove redundant alias registration from SiteServiceProvider.

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>
Merge branch '2.0'